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Livermore
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Masimo Corp

MASIDelisted Jun 10, 2026
Industry
Electromedical & Electrotherapeutic Apparatus
SEC CIK
0000937556

Masimo Corp was delisted on Jun 10, 2026; its insiders filed their last Form 4 on Jun 12, 2026; 451 institutions reported holding it in 13F filings for Q1 2026, worth $9.69B in total; Soros Fund Management was the only superinvestor holding it.

13F holders, Q2 2025

Institutional positions in Masimo Corp as of Jun 30, 2025. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
379
−11 vs. Q1 2025
Shares held
57.5M
+3.35M (+6.2%) vs. Q1 2025
Total value
$9.68B
+$653.6M (+7.2%) vs. Q1 2025
New holders
46
127 more added
Sold out
57
136 more reduced

3 institutions that held it in Q1 2025 haven't filed for Q2 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q1 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting MASI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ2 2025: 379 institutions
Q1 2021: 481 institutionsQ2 2021: 459 institutionsQ3 2021: 475 institutionsQ4 2021: 520 institutionsQ1 2022: 457 institutionsQ2 2022: 417 institutionsQ3 2022: 418 institutionsQ4 2022: 405 institutionsQ1 2023: 428 institutionsQ2 2023: 415 institutionsQ3 2023: 357 institutionsQ4 2023: 342 institutionsQ1 2024: 339 institutionsQ2 2024: 352 institutionsQ3 2024: 362 institutionsQ4 2024: 366 institutionsQ1 2025: 393 institutionsQ2 2025: 379 institutionsQ3 2025: 358 institutionsQ4 2025: 392 institutionsQ1 2026: 451 institutionsQ2 2026: 2 institutions
Value heldQ2 2025: $9.68B
Q1 2021: $10.3BQ2 2021: $11.1BQ3 2021: $12.5BQ4 2021: $13.6BQ1 2022: $6.61BQ2 2022: $5.81BQ3 2022: $6.54BQ4 2022: $6.58BQ1 2023: $8.30BQ2 2023: $7.56BQ3 2023: $4.18BQ4 2023: $5.91BQ1 2024: $7.59BQ2 2024: $6.24BQ3 2024: $6.72BQ4 2024: $8.50BQ1 2025: $9.02BQ2 2025: $9.68BQ3 2025: $8.29BQ4 2025: $7.20BQ1 2026: $9.69BQ2 2026: $16.2K
Institutions holding MASI and their total value by quarter
QuarterHoldersValue
Q2 20262$16.2K
Q1 2026451$9.69B
Q4 2025392$7.20B
Q3 2025358$8.29B
Q2 2025379$9.68B
Q1 2025393$9.02B
Q4 2024366$8.50B
Q3 2024362$6.72B
Q2 2024352$6.24B
Q1 2024339$7.59B
Q4 2023342$5.91B
Q3 2023357$4.18B
Q2 2023415$7.56B
Q1 2023428$8.30B
Q4 2022405$6.58B
Q3 2022418$6.54B
Q2 2022417$5.81B
Q1 2022457$6.61B
Q4 2021520$13.6B
Q3 2021475$12.5B
Q2 2021459$11.1B
Q1 2021481$10.3B

Institutions, Q2 2025

Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q1 2025.

Institutions holding MASI in Q2 2025
InstitutionSharesValue% of portfolioChange in sharesAction
EverSource Wealth Advisors, LLC188$31.6K0.00%−33−14.9%Reduced
Skopos Labs, Inc.187$31.5K0.00%+75+67.0%Added
Smartleaf Asset Management LLC170$28.6K0.00%−88−34.1%Reduced
SRS Capital Advisors, Inc.163$27.4K0.00%+53+48.2%Added
Northwestern Mutual Wealth Management Co152$25.6K0.00%00.0%Unchanged
GW&K Investment Management, LLC135$23.0K0.00%00.0%Unchanged
Bessemer Group Inc127$21.0K0.00%+6+5.0%Added
Optiver Holding B.V.124$20.9K0.00%+6+5.1%Added
Nomura Asset Management Co Ltd120$20.2K0.00%00.0%Unchanged
True Wealth Design, LLC116$19.5K0.01%+27+30.3%Added
Harvest Fund Management Co., Ltd115$19.0K0.00%−3,814−97.1%Reduced
GWM Advisors LLC112$18.8K0.00%00.0%Unchanged
Fourth Dimension Wealth, LLC100$16.8K0.01%00.0%Unchanged
Simplex Trading, LLC98$16.0K0.00%−2,240−95.8%Reduced
Parkside Financial Bank & Trust93$15.6K0.00%00.0%Unchanged
Rise Advisors, LLC93$15.6K0.01%00.0%Unchanged
Huntington National Bank87$14.6K0.00%−219−71.6%Reduced
Covestor Ltd81$14.0K0.01%−1−1.2%Reduced
Central Trust Co79$13.3K0.00%00.0%Unchanged
Boreal Capital Management LLC75$12.6K0.01%+75New
Smithfield Trust Co65$11.0K0.00%00.0%Unchanged
Hantz Financial Services, Inc.65$11.0K0.00%+59+983.3%Added
Holos Integrated Wealth LLC68$9.84K0.01%00.0%Unchanged
CIBC Private Wealth Group, LLC55$9.25K0.00%−182−76.8%Reduced
Investors Research Corp50$8.41K0.00%00.0%Unchanged
GeoWealth Management, LLC50$8.41K0.00%+50New
Clean Yield Group49$8.24K0.00%00.0%Unchanged
Spire Wealth Management44$7.40K0.00%00.0%Unchanged
Salomon & Ludwin, LLC40$6.85K0.00%+40New
Geneos Wealth Management Inc.40$6.73K0.00%+3+8.1%Added
First Horizon Advisors, Inc.39$6.56K0.00%00.0%Unchanged
GPS Wealth Strategies Group, LLC37$6.22K0.00%00.0%Unchanged
Farmers & Merchants Investments Inc36$6.06K0.00%+3+9.1%Added
Hemington Wealth Management38$6.00K0.00%−6−13.6%Reduced
Steward Partners Investment Advisory, LLC35$5.89K0.00%−19−35.2%Reduced
Nisa Investment Advisors, LLC34$5.72K0.00%+4+13.3%Added
Larson Financial Group LLC33$5.55K0.00%+11+50.0%Added
Inlight Wealth Management, LLC30$5.05K0.00%00.0%Unchanged
Bell Investment Advisors, Inc29$4.88K0.00%+12+70.6%Added
Essential Partners LLC29$4.88K0.00%+29New
Hallmark Capital Management Inc26$4.37K0.00%00.0%Unchanged
Sachetta, LLC23$3.87K0.00%00.0%Unchanged
JFS Wealth Advisors, LLC20$3.37K0.00%−3−13.0%Reduced
WealthCollab, LLC20$3.37K0.00%00.0%Unchanged
Ameriflex Group, Inc.20$3.33K0.00%00.0%Unchanged
Brown Brothers Harriman & Co17$2.86K0.00%+17New
Kestra Investment Management, LLC16$2.68K0.00%+9+128.6%Added
Private Wealth Management Group, LLC15$2.52K0.00%−9−37.5%Reduced
J.Safra Asset Management Corp15$2.52K0.00%00.0%Unchanged
WPG Advisers, LLC15$2.52K0.00%00.0%Unchanged
Whipplewood Advisors, LLC14$2.35K0.00%+14New
Capital A Wealth Management, LLC20$2.34K0.03%+20New
Adirondack Trust Co12$2.02K0.00%00.0%Unchanged
Fortitude Family Office, LLC11$1.85K0.00%+11New
Harbour Investments, Inc.9$1.51K0.00%−10−52.6%Reduced
DiNuzzo Private Wealth, Inc.6$1.01K0.00%00.0%Unchanged
Leonteq Securities AG6$1.01K0.00%00.0%Unchanged
Creative Financial Designs Inc5$8410.00%00.0%Unchanged
Kayne Anderson Rudnick Investment Management LLC5$8410.00%00.0%Unchanged
Principal Securities, Inc.4$6730.00%−54−93.1%Reduced
Prestige Wealth Management Group LLC4$6730.00%00.0%Unchanged
Highline Wealth Partners LLC4$6730.00%00.0%Unchanged
Cromwell Holdings LLC4$6730.00%+4New
Hughes Financial Services, LLC4$5790.00%00.0%Unchanged
South State Corp.3$5050.00%−77−96.3%Reduced
SJS Investment Consulting Inc.3$5050.00%−2−40.0%Reduced
Bare Financial Services, Inc3$5050.00%00.0%Unchanged
Rialto Wealth Management, LLC2$3370.00%+2New
Comprehensive Financial Planning, Inc.2$3360.00%00.0%Unchanged
HFM Investment Advisors, LLC2$3360.00%+1+100.0%Added
Bay Harbor Wealth Management, LLC2$3360.00%+1+100.0%Added
AdvisorNet Financial, Inc2$3360.00%+2New
Twin Peaks Wealth Advisors, LLC2$3000.00%+2New
DecisionPoint Financial, LLC1$1700.00%+1New
Rothschild Investment LLC1$1680.00%00.0%Unchanged
Parkworth Wealth Management, Inc.1$1680.00%00.0%Unchanged
Financial Management Professionals, Inc.1$1680.00%+1New
Tortoise Investment Management, LLC1$1680.00%+1New
Capital Advisors, Ltd. LLC2$00.00%00.0%Unchanged
Artisan Partners Limited Partnership0$00.00%−299,023−100.0%Sold out
ExodusPoint Capital Management, LP0$00.00%−59,792−100.0%Sold out
Corebridge Financial, Inc.0$00.00%−49,327−100.0%Sold out
Integral Health Asset Management, LLC0$00.00%−45,000−100.0%Sold out
Lisanti Capital Growth, LLC0$00.00%−30,485−100.0%Sold out
Redmile Group, LLC0$00.00%−26,062−100.0%Sold out
EAM Investors, LLC0$00.00%−22,952−100.0%Sold out
Aquatic Capital Management LLC0$00.00%−17,388−100.0%Sold out
Aster Capital Management (DIFC) Ltd0$00.00%−11,912−100.0%Sold out
Neo Ivy Capital Management0$00.00%−10,248−100.0%Sold out
Virginia Retirement Systems Et Al0$00.00%−10,197−100.0%Sold out
Fieldview Capital Management, LLC0$00.00%−8,675−100.0%Sold out
Centiva Capital, LP0$00.00%−7,530−100.0%Sold out
Versor Investments LP0$00.00%−6,978−100.0%Sold out
Sigma Planning Corp0$00.00%−6,365−100.0%Sold out
Polar Capital Holdings Plc0$00.00%−6,023−100.0%Sold out
Bayesian Capital Management, LP0$00.00%−6,000−100.0%Sold out
Legato Capital Management LLC0$00.00%−5,245−100.0%Sold out
Point72 Hong Kong Ltd0$00.00%−4,852−100.0%Sold out
Quantitative Investment Management, LLC0$00.00%−4,462−100.0%Sold out
Pinebridge Investments, L.P.0$00.00%−3,954−100.0%Sold out